Determining Ideal Slug Size Diameter?

Forums Pellets, Projectiles, Slugs, & Ammo Determining Ideal Slug Size Diameter?

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    mmahoney
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    I’ve decided to purchase a set of Corbin dies and swage my own slugs for my Taipan Veteran Long .22. I’ve shot about every commercially available slug through the gun trying to identify the diameter that the gun likes best but have hit a snag. So far the best results I get are from .2155 diameter slugs. I suspect that an even smaller diameter might even be better but finding smaller diameter slugs is not possible.

    I recently pushed several slugs down the barrel and have determined that the breech end of the barrel is .2155 inch diameter sized but the choke at the end of the barrel is only .214 inches in diameter. When determining the ideal slug size, which measurement is preferred?

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    jwrabbit123
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    well corbin will tell you push 5 or 6 pellets threw bore and measure , or you can just make a mold of your choke and add .0005 , or you can get some slugs and like a noe or other sizer and size slugs your gun likes and you can go in .0005 increments to see which shoots  best and weather dry or lubed works best , with corbins swage better to use the press and you can swage you r lead wire instead of buying rools just use pure lead or no harder then 6bhn so you don't wear out dies ,  , I make have corbin wire cutters and or swage molds for .22 cal

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    jwrabbit123
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    mmahoney what is your best slug and your tune in fpe? I have a taipan veteran std and I use it strictly with slugs with tune I did , I am grouping sub MOA now with entire clip

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    mmahoney
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    So far the best are 22 grain AVS slugs at 900 fps (sub MOA). The gun might like a different velocity better but I haven't collected enough data to know for certain. The AVS slugs are supposed to be .217 diameter but they are definitely .2155. My gun shoots them faster than other slugs. The friction down the barrel is noticeably reduced.

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    jwrabbit123
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    ok so you saying you shooting 38fpe? I found best slugs for my tune is 35 gr and I am shooting 52fpe and I am using MP slugs sized to .216 using 95% lead 5% tin . I have tried nsa 28.5 and some other 34 and 30 gr , and I tried the hn 30 and 27 gr ,as well  all shoot fair , but best is 35 gr in mine , to get this power I did a few mods in a earlier forum but only part I replaced is the hammer spring , but I am playing with tune with bigger plenums now to see what it can do  LOU

     

     

    mine is std length ,is your s long or std  or compact ?

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    mmahoney
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    My gun is the long version with a stronger hammer spring but no other mods. I have Ernest's power plenum to install but haven't done so yet. I want to get plenty of data before the installation so I can accurately determine the effects of the install. 

    I just received a detailed reply from Dave Corbin on the topic. To summarize it is best to let the choke do it's job and size for the chamber area of the barrel. Otherwise, you lose air pressure around the slug. A loose fitting slug can also be flared out of balance which would obviously have a negative effect on accuracy. Looks like I'm going with a .2155 inch sized die.

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    rangur1
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    you will find the plenum for the taipan will help with shot count at almost all power settings. the power level seems to be requiring a heavier hammer spring to really push the power. reg settings may require a tweak as well. dillon and myself have been adjusting our taipan longs last couple weeks. info is in a PCP airgun post "taipan plenum" goes into big detail. however , the factory settings with hammer spring adjuster should push slugs quite well when cranked up.

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    mercado
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    My .22 cricket compact…22 taipan veteran long…22.condor .22 Sumatra all prefer slugs sized. 249…will buy a sizer in 248 to se how it works..everything above 249 is simply to tight..n go everywhere..maybe that why jsb slugs are coming..216.

     

     

     

    • This reply was modified 8 months ago by mercado.
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